Mac Pro :: RAID 1 For External Hard Drives?
Feb 2, 2009
I currently have a 2TB WD mirror edition that is setup in RAID 1 so it will mirror all my data. Now I also have a bunch of other drives laying around which I also feel the need to back up and currently I am doing this by doing a whole bunch of dragging and dropping and copying and pasting etc etc etc and this is making me very tired. I know that a setup is possible in disk utility but I am not at all sure about how to configure it so I wont lose any of my data.
Some details about my setup:
Mac OS X 10.5.6
PowerPc G5
Harddrives: two 1TB WD MyBooks, and two 500gig WD Mybooks --> these pairs need to mirror each other and make my life less of a hassle.
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May 21, 2012
Since upgrading to Mac OS X 10.7.4 I am unable to mount any of my G-Tech Raid hard drives.
Info:
iMac, Mac OS X (10.7.4)
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Jun 4, 2012
So I have a Mac Pro with Bay 1 acting as my regular start up drive. I also have three other Western Digital 500GB hard drives that I have been using as a RAID backup system. However, when I place all three of the RAID hard drives into Bays 2, 3, and 4, the computer will not boot. It never reaches the Apple logo, and continually tries to restart. So I figured one of the hard drives was corrupt.
However, I have tested all three hard drives in Bay 2 and the computer will boot just fine. I have also tested each bay individually (i.e. the same RAID hard drive in each of the Bays seperately) and the computer still boots fine. I can even power up with any two hard drives in Bays 2 and 3. The only time I can't power up is when all three of the hard drives are occupying all three of the extra bays.
Also, none of the RAID hard drives show up in Disk Utility or on the desktop. Shouldn't I be able to view them as normal internal or external hard drives being plugged into my Mac? They do show up in RAID Utility. Is this normal with RAID hard drives, or should they always show up in Disk Utility?
I created a new RAID backup with two of the drives together (Bays 2 and 3) and it recognizes it in System profiler. However, I want to be able to use all three drives for the RAID.
Info:
Mac Pro, Mac OS X (10.6.8)
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Mar 14, 2009
What is, in theory, the fastest raid type, when I use two hard drives.
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May 2, 2010
I have read that it is "a shortcut to disaster" if I do a RAID0 (or any other RAID for that matter), if the Hard Drives are dissimilar. I have the original HD 149GB (now 5 years old), and have bought a new 1T HD, and was planning on setting them up as a striped RAID0. Is this a bad idea? Should I purchase a second 1T HD and do a RAID0 or RAID1 setup instead?
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May 24, 2010
I have a Mac Pro with all hard drive slots filled. The first two disks (includes startup disk) are independent, and 3 and 4 are set up in a RAID 1 mirror. I have to take my computer into the Apple store for a repair and I'd like to just take out all the disks except for my startup disk... however I'm not sure how to go about doing so for the RAID. If I take the drives out, and boot up the computer with them no longer inside, will the computer "freak out" and/or will the computer no longer recognize the RAID if I put them back in again later?
If the latter is the case, will the data be lost or would I just have to set up the RAID again... and if I do that, will that also cause the data on the drives to be lost, or is it possible for it to mirror them again without needing to make changes to the data?
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Aug 15, 2010
What should I be doing to my drives before building arrays with them?
Hitachi do a Drive Fitness Test and Seagate something similar but I have not been able to get either to work on a BootCamp Windows partition.
I tried formatting in Disk Utility and pulling some data on and off. I'm now running a scan for bad blocks in Drive Genius (is this worth it? It's going to take about a week at this rate). Anything else I should do?
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Mar 26, 2008
I have a 8-core MP 2.8Ghz with 10gb ram and Ati 2600HD. I'll someday replace the ATI with a quadro (all my application is 3d/CAD/Design) I'm installing 4 of the WD640 drives, they arrive on Friday.
I would love to order the CalDigit RAID card but after searching I finally figured out it's not available until next month.
That said, I need my system to start working ASAP and I don't want to wait if I don't have to.
I'm a designer, I need fast scratch so some striping needs to be involved. I also need data protection. At this capacity Time Machine isn't going to be of any use and I'd prefer redundancy anyway.
The 4 WD640s are replacing: 1 750gb 7200.11, 2 WD SE16 500GBs, and 1 320GB (Apple Stock Drive).
I would like to sell some of those drives to defray the cost of this endeavor but I'm open to keeping 1 or possibly 2 as external drives or stuffing one into the optical bay with a converter.
I want speed and reliability, of course! But really the largest motivator here is the combined drive aspect. Having so many volumes is driving me nuts.
My intention had been RAID 5 or 6 but I now know that Apple Software RAID can't do this. So now it seems with software RAID 0+1 would be the only option.
Realistically, does the cpu performance degradation outweight the speed gained from striping the drives? It's so difficult to determine bottlenecks.
Any thoughts on my best bet without/before the RAID card arrives. Can I migrate the array after installing the card without data loss?
If I just JBOD the drives can the concatenated set be broken up ever? I was thinking I could JBOD until the card came.
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May 3, 2010
I have been reading about people taking a SSD drive for Boot and OS and using a second HD for their data using MCE's Optibay hard drive enclosure.
I would love to go this way but I can't justify spending all the cash on a SSD yet. Could I put in 2 500GB 7200 rpm drives and RAID 0 them? I know this wont be as fast as SSD but it should be faster than a single hard drive and hold a lot more storage for less $$$.
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Nov 21, 2008
I'm thinking about getting a Mac Pro tower from apple, and then buying two 500gb hard drives to place them in a raid 0 config. My question is, is setting up raid as easy as taking out the existing hard drive, placing both the new drives into the mac pro, and selecting raid 0 from OSX when I reinstall the operating system?? Or does the Mac have something similar to a Bios setup where I select that?
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Jul 11, 2009
I just got a used mac pro quad. I plan to use it for video production- final cut pro, pics - aperture, and music production- protools. THe computer came with 3 - 10k rpm 160g hd's. Two of them are set up as a raid 0. I like the idea of having a faster drive as a boot drive, but 160 seems kind of small to me as the drive to run memory hungry apps and the operating system. Am I right? I could go to a 300g 10k rpm drive. I am also thinking about getting a bigger drive, say a 750g or 1 tb 7200 rpm. Should I use this as the boot drive or as a secondary storage drive?. If it's the boot drive should I add the other 160g 10k drive to the raid or keep it separate? I assume that neither way would be wrong, nor create a problem, but since I haven't put anything on it yet, I'm wondering what would be the most efficient way to manage my files and get the most out of my computer.
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May 1, 2008
I have a macpro with 4 x 1tb drives
Is it possible to get a highpoint raid controller and put those 4 drives in a raid 5 array (and then create partitions inside that array) - or do you need to have 1 drive by itself for the operating system, and then create a raid array using the remaining 3 drives?
Lastly, are the highpoint 3500 series a decent card? and fully compatible?
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Jan 11, 2011
i am very interested in buying a Mac. But I need an external hard drive for my stuff. What are the best 1TB or higher external hard drives for a Mac Book Pro?
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Feb 25, 2009
I often use external hard drives to back up my work. Recently I purchased a 1TB Lacie drive. I took a week to build a lovely new file structure for my work. At the end of this week, I began deleting the old files on other hard drives so as to transfer my new neatly structured work back on. In the midst of this, the brand new hard drive crashed, illiciting only the clicking sound of death.
That hard drive, some of my work (a very small amount but still) and a week's worth of sweat and blood was gone in an instant. The person I took it to to look at it mentioned a power surge as being a possible cause for the crash. Anyway, I returned the lacie and bought a 1T Western Digital Mybook (silver). I then began dumping the old back ups onto this.
A week in and this one is crashed too. No clicking sound of death. It calmly sits on my desk with it's unceasing unblinking blue light and refuses to show up in utilities no matter what I do. So I assume it's a goner also. I'll return it also of course. Is something causing these drives to fail...that exists in my walls? Are there power surges causing my drives to die...? OR is it simply a case of bad luck with my choices of new drives?
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Apr 19, 2010
I was done doing various tasks on the iMac and when I decided to plug in the external hard drive for a Time Machine backup, the drive spun, but was never shown on the desktop.I also tried another external drive and had the same thing happen.
After rebooting (hey, this sounds like Windows!), the drive again showed up on the desktop and Time Machine worked fine.Is an external hard drive not showing up on the desktop a somewhat common issue?
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Apr 20, 2010
i'm cloning my mac hd (mac book pro, snow leopard) and though i've made successful clones, the sum of the hard drives (mac hd and external hd) don't match. for instance, my mac hd reads at: 233.71 GB, however the cloned external hd reads at: 216.54 GB. can anyone explain this discrepancy? are there certain things that don't go into the clone that are on the mac hd?
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Oct 26, 2010
Having chosen a useful large external hard drive I find it says 'Windows only'. Surely, though the software will not work, all I need to do is format the HD and it will work. The machine is: Seagate FreeAgent 500GB External Hard Drive USB2.0 16MB.
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Oct 29, 2006
I am relatively new to Macs, have been using it for 5-6 months. I already know how to do everything but share folders and drives using my network connection. I have an iMac and a Macbook Pro. I have a 120GB Hard Drive hooked up to the iMac via Firewire. How can I share that Firewire External Hard Drive with my Macbook Pro? What are the steps I have to follow to connect both macs? Is there a way that I could also share my iMac's desktop files with my Macbook Pro? I already have a wi-fi connection between both computers, I just don't know how to share that hard drive between both simultaneously..
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Dec 11, 2008
I have been using a MBP for a few months now and I am making a total conversion from PC user to Mac user in January when I buy a nice new 24" iMac but to go with it, I want to buy a couple of new external hard drives. I have currently got a Seagate FreeAgent 500GB USB Drive which is Windows Formatted and I will be keeping that to use with my work laptop (a Dell), and I have been really pleased with its reliability. Anyway, I have been looking around and there are some fab drives on the market but I have a couple of questions. If I get an iMac with a 500GB Internal Hard Drive, how big an External hard drive will I need to use Time Machine without having to delete backups all the time?
Also, I have been primarily looking at the new Seagate FreeAgent drives and the do a PC version (USB) and a Mac version (USB/FW400/FW800), but the 640GB USB version costs �76 whereas the 500GB FW version costs �100. Would you go for the bigger size or the added benefits of FW800? Will I notice much speed difference between USB and FW800?
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Feb 26, 2009
What is the best external hard drive with 1TB for the new Macbooks? I heard a rumor the new Macbooks don't have firewire... is that true?
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Jul 25, 2009
I have an external hard drive that I have been using for my Pcs, and when I hook it up to my mac I cannot write to it (although I can read from it). Is it possible to write to this external hard drive?
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Oct 4, 2009
I can't figure out the difference between these two hard drives, they look identical but Amazon says the latter one is the "newer" version, are they the same thing?
Which is the better buy?Also, Is it recommended I get a Mac formatted external drive? Does it do it automatically when I plug it in or is it easier to get a mac formatted drive?
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Mar 3, 2010
I have a fairly new iMac that I upgraded to Snow Leopard a few months ago. It seemed to me that prior to that my external HD worked fine with Time Machine. Since then it is recognized for a short period of time when I connect it, then it disappears. I replaced it with a WD My Book. It worked perfectly for a month and now it has shut down. Has anybody had run into this before? I can't believe that every hard drive fails within a month in the same mysterious way!
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May 10, 2010
I've had a LaCie Porsche Design for the last 6 years with no problems but with the upgrade to a MBP I'm looking to get a new portable hard drive (LaCie or another brand). My old LaCie was FW400 so I'd be looking at FW800 now. Which make and model do you use and are you happy with it's performance?
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May 25, 2010
My external hard drive has been corrupted and the error message is telling me to reformat it. However, through all the research I have done to find out how, everything I've found has told me to use Disk Utility to just erase everything on the disk to do this. When I try to do this, it tells me that I can't erase anything because the disk cannot be unnmounted. What should I do?
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Aug 2, 2010
I just got a brand new Mac Book Pro. I wanted to get an external harddrive for it. I have a gift card to HP and wanted to buy one from them? Does anyone know if they are compatable? If not, anyone have any suggestions for a HD that is good, but not terribly expensive? I want one that is at least 250 GB.
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Aug 14, 2010
So I just installed a larger hard drive in my macbook pro. As OSX was installing I decided to read reviews online (bought it in the store when I got the MBP). They're all really bad about using the drive in a MBP - [URL]. I'm installing the application software now and the hd is spining a lot and vibrating the case and making a lot more noise. I've read a few Seagate reviews and they're not much better for that size.
I want to install a huge hard drive because this is going to be my main computer for at least 8 months while I'm working away from home. Normally I have a desktop w/ a huge hard drive so I don't care what's on my laptop. Anyway, based on these reviews and how the drive has been feeling in the case, I think I might re-evaluate putting a larger drive in, and instead go with an external. I can fit all my photos and music on a 250, but I couldn't fit everything I store on my desktop on a 250.
So my first question is, is there a good, reliable 500gb or larger 5400rpm replacement hard drive for the mbp, that a lot of people like? And then the main question: I have a lot of large video files on my Windows box that are over 4gb, which is the FAT32 limit. When I transferred them from my old computer I had to rar them to smaller files and then un-rar them. This is quite annoying. If I'm gonna have an external drive, I'd like one that can be used on both windows and mac and support 4gb+ files..................
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Jun 30, 2008
Can Mac's be started up from external USB2 drives or is external startup limited to firewire only? I have several machines, IMac (all four flavors) Mac Book and Pro. I want to use Time Machine as the back to all of these devices but I hesitate because of this possible restriction.
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Apr 23, 2012
What's the best way to mirror two external hard drives connected to two separate computers on a network? Can this be done with the built in file sharing capablities of Lion or do I need to use a utility such as Forklift?
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Dec 10, 2014
Just bought new version of Final Cut and it will not recognize the external hard drive that I plug into my usb or the extra hard drive that I had installed into my laptop to do video work on for more space.
Info:
Final Cut Pro X, Mac OS X (10.7.5)
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